Japan knife attacker reportedly wrote all disabled 'should cease to exist'

The young Japanese man accused in the deadly stabbing rampage Tuesday at a facility for the mentally disabled reportedly wrote a letter to Parliament before the attack claiming, "all disabled should cease to exist."
Japanese officials said they received 26-year-old Satoshi Uematsu's letter months ago outlining the bloody plan. Tuesday's rampage left 19 people dead.
Part of the letter read, "I envision a world where a person with multiple disabilities can be euthanized, with an agreement from the guardians, when it is difficult for the person to carry out household and social activities," NBC News reported. "Now is the time to carry out a revolution and make an inevitable but tough decision for the sake of all mankind."
The 40-minute attack was Japan's deadliest mass killing since the end of World War II. The fire department said 25 were wounded, 20 of them seriously.
The suspect, who had been fired from the facility, calmly turned himself in about two hours after the attack, police said.
Security camera footage played on TV news programs showed a man driving up in a black car and carrying several knives to the Tsukui Yamayuri-en facility in Sagamihara, 30 miles west of Tokyo. The man broke in by shattering a window at 2:10 a.m., according to a prefectural health official, and then set about slashing the patients' throats.
Sagamihara fire department official Kunio Takano said the attacker killed 10 women and nine men. The youngest was 19, the oldest 70.
In February, Uematsu tried to hand deliver a letter to Parliament's lower house speaker that revealed his dark turmoil. It demanded that all disabled people be put to death through "a world that allows for mercy killing," Kyodo news agency and TBS TV reported. The Parliament office also confirmed the letter.
Uematsu boasted in the letter that he had the ability to kill 470 disabled people in what he called "a revolution," and outlined an attack on two facilities, after which he said he will turn himself in. He also asked he be judged innocent on grounds of insanity, be given $5 million in aid and plastic surgery so he could lead a normal life afterward.
"My reasoning is that I may be able to revitalize the world economy and I thought it may be possible to prevent World War III," the letter says.